JPS6143778B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic changing device (hereinafter referred to as changer) for automatically changing the tape cassette of a cassette type video tape recorder (hereinafter referred to as VTR).

An object of the present invention is to provide a changer that can be easily attached to an existing VTR without requiring any changes.

To describe the purpose of the present invention more specifically, the first
In addition to the above purpose, even if the cassette is in the magazine section on the changer side, it is self-retained by pressing the pushbutton corresponding to the desired mode on the changer side, and the cassette is automatically transferred to the VTR. When the mode is set to
To provide a convenient changer in which the mode is automatically activated by operating a push button on the VTR side.

Second, the mechanism that operates the VTR pushbuttons is
After the operation, the VTR's push button is set to a mechanism that allows it to return freely.With this, for example, when playback is performed in playback mode and the end of the tape is reached, the VTR's playback mode pushbutton returns to its original position. To provide a changer that automatically ends a mode being performed regarding a cassette.

Third, when a VTR pushbutton returns, the return of the pushbutton is detected, the cassette is ejected, and the transition to the next cassette is made possible, without any changes being made to the existing VTR itself. To provide a changer capable of automatically exchanging a large number of cassettes without causing trouble.

Fourth, it is an object of the present invention to provide a changer that automatically resumes the previous mode when the power is restored even if the power is temporarily turned off.

Fifth, it is an object of the present invention to provide a changer in which when a stop button on the changeer side is pressed, the mode that has been in effect until then is stopped.

Sixthly, it is an object of the present invention to provide a changer in which when a stop button on the changeer side is pressed to stop the mode that was being performed up to that point, the next time the push button on the changeer side is pressed, the operation of that mode is immediately performed. do.

A cassette type VTR 1 to which the changer of the present invention can be applied has a cassette holder 11 on its upper surface for holding a cassette 19, as shown in FIGS. 1 and 2, and a mode selection screen on the front surface thereof. It has operation buttons 14 for performing the operations. The cassette holder 11 has an opening 12 for inserting and ejecting a cassette on the front surface, and a tape outlet 13 on the rear surface, and rises to protrude from the top panel when inserting or ejecting a cassette. After inserting a cassette, when this holder is pushed down, a tape loading device (not shown) inside the VTR automatically operates, the tape is pulled out from the drawer opening, and wound around a rotating head drum (not shown). Standby for mode operations such as playback or recording. By manually pressing an operation button such as playback or recording, the operation of that mode is immediately performed. The button pressed at this time is self-maintained (locked) in that state. The operation progresses in this manner, and when the tape end is reached, the operation is automatically terminated, the locked button is released, and the pressed button is automatically reset. Even if the stop button is pressed during the operation before reaching the tape end, the operation will end and the locked button will be released. When the eject button is pressed manually while the tape is stationary, the tape loading device is activated, unloading the tape (returning the ejected tape to the cassette), and then unloading the tape into the cassette. The holder will automatically rise and the cassette can be replaced.

In order to control the above-mentioned VTR, the changer according to the present invention has a basic configuration of covering the cassette holder section and operation button section of the VTR, detecting their states, and applying mechanical output. That is, one embodiment of the present invention will be described with reference to the drawings.
A mounting part 3 for attaching to the VTR body 1 and a magazine part 4 for storing tape cassettes.
and in relation to the manually operated push button 501.
An operating section 5 having a mechanism for operating the push button 14 on the VTR main body, an insertion/ejection section 6 for inserting and ejecting a cassette into a cassette holder, a push-down section 7 for pushing down the holder, and controlling each of the above-mentioned sections. It is comprised of a control circuit section 8 for the purpose of operation, and one motor 9 that serves as a power source for each of the above-mentioned sections.

Each part is controlled by the push buttons on the changer.
This is done by detecting the position of the cassette, the state of the VTR push button, the state of the cassette holder, etc. For this purpose, three switches 803, which detect when each push button of the changer is pressed,
804, 805, switches 807 to 810 for detecting the position of the cassette, a switch 812 for detecting that the cassette holder of the VTR is in the raised position, and a switch 806 for detecting the state of the push button on the VTR body. It is equipped. Also provided are a switch 802 for detecting the presence of a cassette in the magazine, and a switch 814 for detecting that the changer 2 is attached to the VTR main body 1.

The control circuit unit 8 controls the normal rotation, reverse rotation, and stop of the motor 9, and controls the six electromagnetic plungers 891 to 8.
96 controls are performed. The plunger 891 is for the cassette dropping device, the plunger 892 is for mode selection, the plunger 893 is for ejecting, the plunger 894 is for driving the cassette pushing/drawing device, the plunger 895 is for specifying the pushing of the cassette, and the plunger 896 is for the cassette holder. This is for starting the pressing operation. Among these plungers, a plunger 892 for mode selection, a plunger 893 for ejecting, a plunger 894 for driving the cassette pushing/drawing device, and a plunger 896 for starting the pushing operation of the cassette holder are operated by the motor 9.
It is used to drive a type of clutch that controls the transmission of rotational force to each part.

Next, the configuration and operation of each of the above parts will be explained in detail.

[Mounting part]

In order to attach the changer 2 to the VTR main body 1, the mounting part 3 includes a mounting part 31 for mounting it on the rear end of the top surface of the VTR 1, and two mounting parts 32 for fixing it in two places on the front bottom of the VTR main body 1. It is made up of The mounting part 31 has a lever 311,
By tilting this lever 311 in the direction of the arrow, the engaging claw 314 is moved to the VTR main body 1 via the link 313.
the groove 16 on the rear end of the upper surface of the holder. thus,
A changer 2 is fixed at the rear of the top surface of the VTR 1. At this time, the attachment detection switch 814 is energized by the top panel of the VTR main body 1.

The mounting portion 32 has a slidable engagement piece 321, which is caused to protrude in the direction of the arrow by operating a knob 322, and is engaged with the front lower bottom surface 15 of the VTR main body 1.

[Magazine section]

As shown in FIGS. 2 and 3, the magazine section 4 is composed of a square cylindrical cassette storage section 402 having a cassette insertion opening 401 on the front surface, in which several cassettes 19 are stacked one on top of the other. It can be stored. Cassette 19 located at the bottom end
is a claw member 411 that constitutes the cassette dropping device 41.
It is locked by a lower claw 413 of.

The cassette dropping device 41 consists of a member 411 having an upper claw 412 and a lower claw 413, and a shaft 41
It is rotatably attached around 4.
This member 411 is connected to a link 415 via pins 421 and 422, and this link 415
is biased in the direction of the arrow by a spring 416. Therefore, each of the lower pawls 413 normally protrudes and holds the cassette located at the lowest end.

Link 415 is connected via pin 419 to link 417 which is rotatable about axis 418 . Link 417 is connected to the output shaft of plunger 891 by pin 420. When the plunger 891 operates and its output shaft is pulled in the direction of the arrow, the link 417 rotates in the direction of the arrow, so that the link 415 is moved in the opposite direction (in the direction of the arrow) to the direction of biasing by the spring 416. , so that both lower pawls 413 are retracted and both upper pawls 412 are protruded accordingly. Protruding upper claw 41
2 engages in a groove provided in the side of the cassette 19 immediately above the lowest cassette 19. Therefore, only the cassette located at the lowest end falls. When the plunger 891 stops operating, the claw member 4
11 returns to its original position as shown in FIG. 3, so that the stacked cassettes 19 are held lowered by one cassette as shown in FIG.

Note that the dropped cassette 19 causes the cassette drop detection switch 807 to operate. Further, a detection switch 802 detects the presence of the lowest cassette 19 held by the claw member 411.

[Operation unit]

As shown in FIG. 4, the operation section 5 mechanically operates the operation button 14 on the VTR main body side in response to the operation of the operation button 501 on the changer side. The operation buttons are arranged in the same way on the changer and VTR, and are arranged so that, for example, as shown in Figure 4, seven modes can be selected from the left: eject rewind, stop, play, fast forward, record, and dubbing. . Among these modes, there are five mode selection buttons: rewind, playback, fast forward, recording, and dubbing (these five buttons will be referred to as mode selection buttons to distinguish them from the stop button and exit button described later). ) is transmitted from the chainer side to the VTR main body side via the plunger 892. The detector 803 detects when any of the mode selection buttons is operated.

These five mode selection buttons are locked when pressed, and when the plunger 892 operates, the button on the VTR corresponding to the locked mode selection button is pressed. That is, when the mode selection button is pressed in the changer, the memory of the mode selection is retained, and the push button 14 of the VTR will be pressed later at the timing when the plunger 892 operates. Incidentally, when the push button 14 of the VTR is pressed as described above, it is locked in that state. Therefore, the mechanism for pressing the VTR button is configured to temporarily apply force to the VTR push button, as described below, and when the VTR push button becomes unlocked, it immediately returns to its original state. I'm getting ready to go back. A microswitch 806 detects the state of the mode selection button of the VTR, that is, whether it is pressed and locked or has returned to its original state. To set the eject mode, press the eject button on the changer to lock it, and then press the eject button on the changer.
3 is activated, the VTR's eject button is pressed. Also, the stop mode is transmitted by a mechanical link without going through a plunger, so that when the changer's stop button is pressed, the VTR's stop button is pressed immediately. Pressing of the changer's stop button or eject button is detected by switches 804 and 805, respectively.

The mechanism of the mode selection button is constructed as shown in FIGS. 5A to 5C. The slide lever 503 is moved by the leg 502 of the mode selection button 501.
is moved, and the end of the link 505 is fixed by the tip of the slide lever 503. This link 505 is connected to the link 504 and the link 506, and the link 506 is connected to the gear block 5.
It is connected to 07. This gear block 507
is freely rotatable about the shaft 510 and has a spring 511
is biased in the direction of the arrow. The gear block 507 includes a driving gear 509 to which driving force from the motor is transmitted, and a driven gear 508 that meshes with the driving gear 509.
It is equipped with. This driven gear 508 is
Rack 51 provided on the leg 514 of the operating arm 513 for pushing the push button 14 of the VTR
2 are designed to interlock. This operating arm 513 is freely movable in the vertical direction (in the direction of the arrow) and is biased in the direction of the arrow by a spring 515 with a weak force. When the operating arm 513 is activated and the push button 14 of the VTR is pressed, the operating arm 513 is lowered, and therefore the detection switch 806 is turned on.

When the mode selection button 501 is pressed, FIG.
As shown in the figure, the slide lever 503 moves and its tip fixes one end of the link 505. When plunger 892 operates to pull link 505 in this state, gear block 507 tilts as shown in FIG. 5B, and gear 508 and rack 5
12, and the operating arm 513 is pulled downward (indicated by the arrow) with a strong force by the transmitted rotational force of the motor. plunger 89
2 is common to the five mode selection buttons 501, and an operating lever 503, a link mechanism, and a gear block 507 are provided for each mode selection button. The plunger 892 is configured to pull five links 505 in common. Therefore, if the mode selection button 501 of the changer is not pressed, the slide lever 503 does not protrude, and therefore one end of the link 505 is not fixed, so even if the plunger 892 operates, as shown in FIG. 5C. As such, the link 506 does not move, and therefore the gear block 507 does not tilt. In this way, one mode selection button pressed by one plunger 892 corresponds to one mode selection button pressed by one plunger 892.
You can operate button 14 on the VTR.

A mechanism for operating the VTR push button 14 in response to the changer push button 501 without using a plunger is constructed as shown in FIGS. 6A and 6B. A push lever 521 is moved in the direction of the arrow by a leg 502 of a push button 501 of the changer, and the tip of the push lever 521 fixes the tip of a link 522.
The link 522 is rotatably supported around a pin 523. This link 522 has pin 5
24, and a link 525 having a locking pawl 526 is attached to this pin 524. Furthermore, a link 529 is attached to the pin 523, and the engaging portion 5 of this link 529
30 and the engaging portion 527 of the link 525 are adapted to engage with each other. Therefore, when the link 522 is rotated in the direction of the arrow by the push lever 521 as shown in FIG. 6B, the link 529 is rotated in the direction of the arrow via the engaging portion 527 of the link 525. Therefore link 529
The pin 533 that is engaged with the tip of the is pushed down, and the operating arm 513 is moved downward (in the direction of the arrow).
move it to In this way, the operation button 14 of the VTR
A pushing operation is performed. When the changer operation button 501 is further pressed, the lock pawl 526 of the link 525 hits the lock release plate 531.
Link 525 rotates about pin 524. Therefore, the engagement between the engagement portion 527 of the link 525 and the engagement portion 530 of the link 529 is released, and the link 529 rotates in the direction of the arrow due to the force of the spring 532. At this time, the change gear push button 501
and the VTR push button 14 are respectively locked, but the coupling mechanism is released, so that the VTR push button 14 can be returned automatically, and the changer push button can be returned independently. It is also possible.

When using the connection mechanism shown in Figures 6A and 6B
When the VTR button 14 is automatically reset, the changer push button 501 is also unlocked by a mechanism as shown in FIGS. 7A and 7B. First, when the push button 501 of the changer is pressed, the tip of the lock plate 542 fits into the fitting part 541 provided on the leg part 502. This lock plate 542 is freely rotatable about a pin 543 and is urged in the direction of the arrow by a spring 544. This locked state is the 7th A.
This is shown by the solid line in the figure. VTR button 14
When the lever returns, the operating arm 513 rises (in the direction of the arrow), so that the pin 555 provided on its leg 514 causes the end 553 of the lever 550 to rotate in the direction of the arrow. This lever 550 is pin 5
It is free to rotate around 51. This lever 5
50 is located at the solid line position in FIG. 7A by a protrusion 554 provided on the leg 514 of the operating arm 513 that descends when the button 14 of the VTR is pressed. The other end 552 of lever 550 is adapted to slide on a cam 548 provided on link 545. Since this cam 548 has a protrusion 549 at the center, when the lever 550 rotates in the direction of the arrow, the link 545 is attached to the pin 54.
6 is rotated once to the position indicated by the chain double-dashed line, and then returned to the position indicated by the solid line, making a reciprocating motion. Therefore, the release claw 5 of the link 545
47 pushes the tip of the lock plate 542 and the leg 5
02 is disengaged from the fitting portion 541. When the VTR button 14 is automatically restored in this way, the changer push button 501 is also unlocked and restored. The restored state is shown in FIG. 7B.

[Insertion/ejection section]

As shown in FIG. 2, the insertion/ejection section 6 is disposed below the cassette magazine 4, and feeds the fallen cassette 19 into the cassette holder 11, and transports it from the inside of the cassette holder 11 to the drawer/ejection port 403. When the fallen cassette 19 is carried toward the holder 11, the detection switch 80 is first activated.
8 is turned on, and when the cassette 19 is inserted into the holder 11 and the push-in is completed, the switch 808 is turned on.
is turned OFF, and then switch 809, which was once ON, is turned OFF. Cassette 19 is holder 1
When it is pulled out from 1 and carried to the discharge port 403, the switch 810 is turned OFF once and then turned ON again. The movement of the cassette 19 transported in this manner is detected by switches 807, 808, and 810.

As shown in detail in FIG. 8, the insertion/ejection section 6 includes a belt conveyor device 61 for loading and conveying the cassette 19, and a push-pull device 6 for pushing and pulling out the cassette into the cassette holder 11.
It consists of 5. Belt conveyor device 6
1 is a plurality of belts 611, 61 that are respectively stretched around drive rollers 614, 615 of a drive shaft 613 and driven rollers 617, 618 of a driven shaft 616.
2, and power from the motor 9 is transmitted to the drive shaft 613 via a gear mechanism 621.

The pushing/drawing device 65 pushes the rear end of the cassette carried by the belt conveyor device and inserted into the holder into the holder 11, and also inserts a claw into the groove in the rear bottom of the cassette housed in the raised holder 11. The cassette is pulled out by engaging the portion 651, and the rear part of the cassette 19 is placed on the belt conveyor device 61. This pushing/drawing device 65 has an L-shaped claw portion 6 at the tip.
51, a lever 652 that supports this claw portion, and a slide lever 661 connected to this lever via a pin 655. A guide pin 653 is provided on the lever 652, and a spring 654 is stretched between the guide pin 653 and the slide lever 661. Therefore, the lever 652 is urged to rotate upwardly in FIG. 8 about the pin 655. The slide lever 661 is provided with a long hole 662, and a fixed slide pin 6 is inserted into the long hole.
63 and 664 are passed through. Slide lever 6
A link 671 is connected to the other end of 61 via a pin 665, and this link 671 is connected to the other end of pin 67.
2 to the crank 673. The crank 673 is connected to the shaft 6 via a clutch mechanism 674.
76 rotational power can be transmitted.
The power from the motor 9 is connected to the shaft 676 through the gear mechanism 67.
8. A lock plunger 894 is provided to control the clutch 674, and when the plunger 894 operates and its output shaft is pulled, a lever 675 moves to engage the clutch 674 and transmit power to the crank 673. Then, the slide lever 661 is inserted into the elongated hole 66.
It will reciprocate back and forth along 2. The guide pin 653 of the lever 652 is guided by a cam 681 as shown in FIG. A switching plate 682 is disposed inside the cam 681, and when a plunger 895 for specifying push operation operates, a lever 689 is pulled, and a link 684 and a shaft 683 are rotated via a pin 687 that engages with a long hole 688. and set the switching plate 682 to the position shown in FIG. When plunger 895 is not operating, lever 689 is extended, link 684 is rotated by spring 685, and switching plate 682 is in the position shown in FIG. 10B.

When the cassette 19 is pushed into the holder 11, the push designating plunger 895 works, and the switching plate 682 is arranged as shown in FIG. 10A. At this time, as described above, the slide lever 66
1 reciprocates back and forth, the guide pin 653 moves along the bottom surface of the cam 681 and the switching plate 682 as shown by the dotted line, so that the tip of the claw portion 651 follows a trajectory as shown by the dotted line 691. Therefore, the claw portion 651 repeatedly protrudes beyond the belt 661 and pushes the rear end of the cassette.

When the plunger 895 for specifying push-in is not operating, the switching plate 682 is arranged as shown in FIG. Therefore, the claw portion 65
1 protrudes larger than the belt 661 and marks the dotted line 692.
Draw the trajectory shown by . Therefore, at this time, holder 1
The operation of engaging the claw portion 651 with a groove provided at the bottom near the rear end of the cassette 19 housed in the cassette 1 and pulling out the cassette 19 is repeated.

[Holder pushing down part]

The holder push-down portion 7 is for pushing down the cassette holder 11 after the cassette is pushed in. As shown in FIGS. 11A and 11B, a pad 702 is attached to the tip of the push-down lever 701. Lever 701 is connected to shaft 717 and is rotated by a force applied to shaft 717 via limiter and clutch mechanism 711.
When the holder 11 is pushed down, the lever 70
Switch 813 operated by protrusion 703 of 1
Detected by Limiter clutch mechanism 71
1 is constructed as shown in FIG. 11C. When the gear 716 rotates, the driving portion 714 also rotates, but since the driving portion 714 and the driven portion 712 are in close contact with each other due to the spring 718, the engagement slope 7
15, the rotation is transmitted to the driven part 712.
Since the driven portion 712 and the shaft 717 are connected, the lever 701 rotates. When the holder 11 is pushed down by the lever 701, the torque transmitted by the limiter/clutch mechanism 711 becomes excessive. Therefore, a slip occurs on the slope 715 of the driven part 712 and the driving part 714, and the driven part 7
12 moves against the force of the spring 718, and the driving part 7
14 is disengaged. In this way lever 701
Do not apply excessive torque.

A driving force from a motor is applied to a gear 716 of the limiter/clutch mechanism 711 via a gear 721 and a gear 727. Gear 721 is rotatably attached to lever 722 via pin 723 and always meshes with gear 727. The lever 722 is rotatably attached to a shaft 724 of a gear 727, and is biased in the direction of the arrow by a spring 728. A link 726 is connected to the other end of the lever 722 via a pin 725, and a plunger 896 for starting the push-down operation is connected to the other end of the lever 722.
When actuated, link 726 is pulled, causing lever 722 to rotate in a direction opposite to the force exerted by spring 728. Then, due to the force of the spring 728, the gear 71
At this time, gear 721, which had not been engaged with gear 6, becomes engaged with gear 716. Furthermore, since the gear 727 rotates in the clockwise direction as shown in FIG. 11A, a force is applied to the gear 721 in the direction of biting into the gap between the gear 716 and the gear 727. Therefore, even after the operation of plunger 896 has stopped, the rotation of gear 727 is transmitted to gear 716 via gear 721. At this time, when the limiter/clack mechanism 711 operates as described above and the gear 716 becomes unloaded, the force that urges the gear 721 in the biting direction is lost, so the force of the spring 728 that is pulling the lever 722 causes the gear 721 to The position returns. Therefore, the meshing between gear 721 and gear 716 is released.

Next, the mutually related operations of the above-mentioned parts will be explained. Control of this operation is performed by a control circuit 8 shown in FIG. Note that the circuit shown in FIG. 12 is just one example, and as will be described later, it goes without saying that various other circuits can be configured to control similar operations.

The motion consists of six basic motion steps. That is, a dropping process in which one cassette 19 is dropped from the magazine section 4, an insertion pushing process in which the dropped cassette is inserted and pushed into the holder 11, a pushing process in which the holder 11 is pushed down, a process in which the button 14 of the VTR is operated, and an eject button of the VTR is pressed. Push holder 1
1, and a draw-out process to carry the cassette 19 from the raised holder 11 to the ejection port 403. Typical cases for each of these steps will be explained step by step with reference to FIG.

[Typical case]

First, it is assumed that the changer 2 is properly fixed to the VTR 1, the switch 814 is turned on, the changer power switch 857 is turned on, and the power supply circuit 856 is working. At this time, the power supply for VTR1 is also
It is ON. It is assumed that there is a cassette 19 in the magazine 4, that there is no cassette 19 in the holder 11, and that the holder 11 is raised. At this time, for example, assume that the playback mode selection button 501 is pressed.

At this time, since the holder 11 is rising, the normally closed contact of the switch 812 is open, and since the cassette 19 is in the magazine 4, the normally closed contact of the switch 802 is open. Since the mode selection button 501 has been pressed, the normally open contact of the switch 803 is closed. By the way, since there is no cassette 19 on the belt conveyor device at this time, the normally open contact of switch 807 is open.
Also, the normally open contacts of switches 808, 809, and 810 are all open. Therefore, OR circuit 834
There is no output, and the inhibition circuit 821 is in a conductive state.
Note that in the prohibition circuit 821 and the prohibition circuit described later, input terminals marked with an O indicate prohibition input terminals. Therefore, the output of switch 803 passes through 821, has a time width determined by a differentiating circuit 822 and a monomulti 823, and operates a plunger 891 for the cassette dropping device. In this way, the falling stroke is performed.

When the cassette 19 falls, the contact of the switch 807 is closed, so that an output is generated from the differentiating circuit 824, which passes through the prohibition circuit 825, sets the flip-flop 826, and applies a reverse rotation input to the motor control circuit 827. The motor 9 is thus reversed and the belt conveyor device 6 is operated to begin transporting the cassette 19 towards the holder 11. Then, the switch 808 is closed, and an output is generated in the differentiating circuit 828, which passes through the inhibiting circuit 829 and the OR circuit 830, and sets the flip-flop 831. In this way plunger 894
operates and the push-pull device begins to move back and forth. At this time, the output through the inhibition circuit 829 also sets the flip-flop 837 at the same time, so that the plunger 895 is operated and a push-in instruction is made. In this way, the holder 11 of the cassette 19
A push is made. When the cassette 19 is completely pushed into the holder 11, the switch 809 is opened. At this time, an output is generated from the differentiating circuit 835, which resets the flip-flops 826 and 837 via the inhibit circuit 836, and also outputs the output from the OR circuit 8.
33 to reset flip-flop 831. Therefore, the reverse rotation of the motor 9 is stopped, and at the same time, the operation of the plungers 894 and 895 is stopped.
In this way, the insertion and pushing operation of the cassette 19 is completed. The above is the cassette insertion and pushing process.

The output generated from the differentiating circuit 835 further passes through a monomulti 840 to provide a reverse rotation input to the motor control circuit 827, and passes through a monomulti 841 to operate the plunger 896. plunger 896
As a result of this operation, the holder push-down portion 7 starts operating, so that the normally open contact of the switch 812 becomes open and the normally closed contact of the switch 812 becomes closed. In this way, the holder depressing stroke is performed.

Since the normally open contact of the switch 812 is opened, one of the inhibit inputs to the inhibit circuit 844 disappears. Further, after the output time of the monomulti 842 corresponding to the loading time, the other inhibition input of the inhibition circuit 844 also disappears. Therefore, switch 80 is closed.
The output of 3 passes through the prohibition circuit 844 to the differentiation circuit 845.
will be sent to. The output of the differentiating circuit 845 is output for a certain period of time by the monomulti 846 to operate the plunger 892 for operating the mode selection button and to apply a reverse rotation input to the motor control circuit 827. In this way, the VTR button operation process is performed.

The VTR's mode selection button is locked in a depressed state, for example, to select a playback mode. When the end of the tape is reached, the playback mode ends, the mode selection button on the VTR is unlocked, and the tape returns automatically. Therefore, the normally open contact of the switch 806 is opened, and an output is generated from the differentiating circuit 849. This output is inhibit circuit 850, OR circuit 851
The signal is sent to the monomulti 852 via the . In this way, the VTR enters eject mode. The above is the eject process.

When the tape is unloaded and the holder 11 rises, the normally open contact of the switch 812 is closed. Therefore, the flip-flop 831 is set via the OR circuit 830, and the plunger 894 for driving the push-in/pull-out device is operated. Also, at this time, an output is generated from the differentiating circuit 838, setting the flip-flop 839, and giving a normal rotation input to the motor control circuit 827, causing the motor 9 to rotate in the normal direction. That is, the belt conveyor device rotates in the opposite direction, and the push-pull device performs a pulling operation. In this way, the cassette 19 housed in the holder 11 is pulled out, and the normally open contact of the switch 808 is closed. Then, an output is generated from the differentiating circuit 828, which passes through the polarity inversion circuit 832 and the OR circuit 833, and resets the flip-flop 831. Therefore, the operation of the plunger 894 is stopped and the operation of the push-in/pull-out device is stopped. The cassette 19 pulled out at this time is placed on a belt conveyor device and conveyed to the discharge port 403 side by this conveyor device. As a result, the normally open contact of switch 810 is opened at one end and then closed again. Closing switch 810 produces an output in differentiator circuit 843 and resets flip-flop 839. Therefore, the normal rotation input to the motor control circuit 827 is stopped, and the motor 9 is stopped. In this way, the drawing and discharging process is completed. At this time, the cassette 19 has been transported to the discharge port 403.

Since the flip-flop 839 has been reset, the inhibition inputs to the inhibition circuits 825, 829, and 836 are eliminated, and therefore, when the first condition is met, a series of operation steps similar to those described above starting from a new falling stroke are sequentially performed. You will be killed. In this way, the cassettes stored in the magazine are inserted into the VTR one after another, and playback or recording is performed in the same mode.

[If the changer stop button is pressed while the VTR is operating in a specified mode]

At this time, the stop button 14 of the VTR is immediately pressed by the mechanical coupling mechanism. Therefore
The mode selection button on the VTR is unlocked and returns automatically. In this way, the VTR stops, but does not move on to the eject process as it does at the end of the tape. That is, since the stop button of the changer is pressed, the normally open contact of the switch 804 is closed, an output is generated from the monomulti 853, and the inhibition circuit 850 is inhibited. Therefore, the output of the differentiating circuit 849 generated by the output from the normally open contact of the switch 806, which is opened in response to the return of the mode selection button of the VTR, cannot pass through the inhibition circuit 850. This is because the plunger 893 for operating the eject button does not operate. Therefore, in this case, the VTR stands by in a stopped state. At this time, the mode selection button on the changer is also unlocked, so by pressing any mode selection button on the changer, the mode selection button on the VTR can be immediately pressed to shift the VTR to that mode.

[If you press the changer eject button when the VTR is in the stopped state]

As mentioned above, when the changer's eject button is pressed while the VTR is in the stopped state, the normally open contact of the switch 805 changes to the differential circuit 854.
produces an output, OR circuit 851, mono multi 8
52 to provide a reverse rotation input to the motor control circuit 827. Further, the plunger 893 for operating the eject button operates. In this way, the eject process described above is performed.

[When there is a cassette in the holder and the holder is pushed down (other things are the same as in the typical case)]

At this time, when the mode selection button on the changer is pressed as in the typical case, the cassette drop stroke will not be performed because the conditions have not been met, and therefore the cassette insertion push stroke and holder push down stroke will also not be performed. This is because the normally closed contact of switch 812 is closed. At this time, since the normally open contact of the switch 812 is open, there is no inhibit input to the inhibit circuit 844, and therefore the switch 812 is open.
The signal from 03 passes through the inhibiting circuit 844 and reaches the differentiating circuit 845. As a result, as above, the VTR
The operation process of the mode selection button will be performed. In this way, the VTR's mode selection button is immediately pressed, and the VTR operates in that mode.

[If the VTR mode selection button cannot be pressed even though the VTR mode selection button operation process has started]

When the accidental erasure prevention claw of the cassette is broken.
This happens when you try to press the record button on a VCR. In this case, even though the button operation process described above has been performed, the mode selection button on the VTR is not pressed down, and therefore the switch 80 is not pressed down.
6 normally open contacts remain open. Therefore, the flip-flop 84 provided through the OR circuit 847
Since the 8 reset signal is not present, flip-flop 848 will be set at the trailing edge of the output of monomulti 846. Therefore, the output of flip-flop 848 passes through OR circuit 851 and reaches monomulti 852, where an eject process is performed. Then, the drawer ejecting process continues, followed by a new cassette dropping process.

[If the changer and VTR power are turned off while the VTR is operating in the specified mode]

At this time, the VTR's mode selection button is automatically unlocked. The changer's mode selection button remains locked. After this, when power is restored, the normally open contact of switch 803 is closed, so no output is generated from circuit 855. This circuit 85
5 is a circuit that produces an output when the power is turned on while the switch 803 is open. Also, at this time, since the cassette holder is in a depressed state, the normally open contact of the switch 812 is open, and the inhibit circuit 8
There are no 44 prohibited inputs. Therefore switch 803
The output from the differential circuit 84 passes through the inhibition circuit 844.
5, the monomulti 846 operates and the above-mentioned
The VTR mode selection button operation process is performed.
In this way, when power is restored, the VTR can be operated immediately in the mode specified by pressing the changer button.

[If the cassette holder is pressed down and the mode selection button on the VTR is not pressed when the power is turned on]

This case occurs, for example, immediately after the changer 2 is attached to the VTR 1. At this time, switch 8
12 normally open contacts are open and switch 806
The contacts are also open. Therefore, OR circuit 847
Since neither of the two inputs are present, there is no reset input to flip-flop 848. Moreover, at this time, the mode selection button of the changer is not pressed, so the contact point of switch 803 is open, so circuit 803 is open.
55 generates an output at the same time as the power is turned on. Therefore, the flip-flop 84 is passed through the OR circuit 858.
8 is set and the ejecting process is performed, and then the process proceeds to the cassette drawer and ejecting process. accordingly
If the cassette happens to be housed in the cassette holder when the changer is attached to the VTR, and the holder is pressed down, the cassette will be automatically ejected as soon as the power is turned on.

[If the cassette holder is raised when the power is turned on]

This case may also occur when the change gear is first installed on the VTR. In this case, when the changer mode selection button is not pressed, the contact of switch 803 is open. Therefore, circuit 85
An output is generated from 5, which passes through an OR circuit 858 and becomes a set input to a flip-flop 848. At this time, the holder is rising, so the switch 81
The normally open contact No. 2 is closed. Therefore, a reset input is input to flip-flop 848 via OR circuit 847. Therefore, flip-flop 848 is not set and therefore no eject operation is performed. Since the normally open contact of switch 812 is closed, an output is generated from differentiating circuit 838, setting flip-flop 839 and providing normal rotation input to motor control circuit 827. At the same time, the flip-flop 831 is set through the OR circuit 830, and the plunger 894 is operated to operate the push-in and pull-out device, thereby causing the pull-out operation. At this time, since the plunger 895 does not operate, the push-pull device performs a pull-out operation. In this way, the drawing and discharging process is performed. In other words, even if there is a cassette in the holder that happens to be in the raised position at the time of installation, the power
It is automatically discharged as soon as it is turned on.

Each operation has been explained above, but regarding the configuration in which the VTR mode is detected by the switch 806 that detects the return of the mode selection button,
Since the mode progress of a VTR is usually indicated by a lamp or the like, it may be possible to detect the flashing of the display lamp instead of detecting the return of the button. For example, if the VTR has a mode progress indicator lamp that goes out when the mode selection button is reset after the VTR stops operating, the phototransistor and transistor 862 shown in FIG. 13 are arranged to receive the light. A photoelectric detection circuit 86 as shown in
The switch 806 can be replaced by using the switch 806.

Further, if the VTR is provided with an indicator lamp indicating that the cassette holder 11 has been raised, the switch 812 can be replaced by having the photoelectric circuit 86 as described above detect the indicator.

As described above with respect to the embodiments, according to the present invention, firstly, the input means of the changer self-retains the input, and a mechanism and drive for operating the push button of the VTR according to the self-retained input is provided. Since the power transmission between the power source and the source is selected, existing VTRs can be easily installed without making any changes, and even if the cassette is in the magazine section on the changeer side, If you press the pushbutton corresponding to the desired mode, it will be self-retained, and when the cassette is automatically set in the VCR, the mode you pressed will be activated.
A convenient changer can be realized in which the mode is automatically activated by operating a push button on the VTR side.

Second, the mechanism that operates the VTR pushbuttons is
After operation, the VTR's push button is designed to allow it to return freely, so for example, when playback is performed in playback mode and the end of the tape is reached.
The VTR's playback mode pushbutton can be reactivated and automatically terminate the mode that was in effect for that cassette.

Thirdly, when a VTR pushbutton returns, the return of the pushbutton is detected, the cassette is ejected, the next cassette is inserted, and the returned pushbutton is operated again. , an existing VTR itself can automatically exchange a large number of cassettes and perform the same tape running mode one after another without making any changes.

Fourth, even if the power is temporarily turned off, the previous mode can be automatically resumed when the power is restored.

Fifth, when the VTR pushbutton returns to its original state, the self-holding of the input means on the changer side can be released in conjunction with this return, so the user can press the stop button on the changer side and operate the changer accordingly. Depending on the part, you can operate the stop button on the VTR to stop the mode that was being used up to that point.

Sixthly, when the stop button on the changer side is pressed to stop the mode that was being executed up to that point,
In response to the return of the VTR pushbutton, the input means on the changer side also returns and remains on standby, so if the desired mode is then input using the input means on the changeer side, the operation in that mode will be performed immediately. can be set.

[Brief explanation of the drawing]

Figure 1 is a front view of the VTR and chainer, Figure 2 is a partially cutaway side view of the VTR and chainer, Figure 3 is a partial front view of the magazine section, and Figure 4 is a partially cutaway side view of the VTR and chainer.
The figures are schematic diagrams showing the mutual relationship between the VTR and changer operation buttons, Figures 5A to 5C, and 6A.
, 6B, 7A, and 7B are schematic side views for explaining the mechanism of the operation section, FIG. 8 is a perspective view showing the insertion/ejection section, and FIG. 9 is a push/pull-out of the insertion/ejection section. Perspective view showing the device enlarged, No. 10
FIGS. A and 10B are side views for explaining the operation of FIG. 9, and FIGS. 11A, 11B, and 11C each show the cassette holder pressing part,
FIG. 11A is a side view, FIG. 11B is a sectional view taken along line B-B in FIG. 11A, FIG. 11C is a partially enlarged perspective view, and FIG. 12 is a block diagram showing the control circuit section.
FIG. 13 is a circuit diagram showing a circuit for detecting a VTR mode. 1...VTR, 2...Chain gear, 3...Mounting section, 4...Magazine section, 5...Operation section, 6...
...Cassette insertion/ejection section, 7...Cassette holder push-down section, 8...Control circuit, 9...Motor.

Claims (1)

[Scope of Claims] 1. A VTR with a magazine section for storing tape cassettes and a manually operated input means.
an operation unit having a mechanism for operating a push button;
The input means includes an insertion/ejection section for inserting and ejecting a cassette into and out of the cassette holder of the VTR, and a push-down section for pushing down the cassette holder, and the input means includes various mechanisms for operating each pushbutton of the VTR. An automatic VTR cassette exchange device comprising means for selecting power transmission between the drive source and the drive source according to an input and operating the VTR pushbutton operation section, and means for self-holding the input for selecting the power transmission. . 2 A magazine section for storing tape cassettes and a VTR in conjunction with manually operated input means.
an operation unit having a mechanism for operating a push button;
The input means includes an insertion/ejection section for inserting and ejecting a cassette into a VTR cassette holder, and a push-down section for pushing down the cassette holder, and the input means includes various mechanisms and drives for operating each push button of the VTR. It consists of a means for selecting power transmission to and from the source according to the input, and a means for self-holding the input,
After each operating mechanism operates a push button on the VTR, the power transmission mechanism between the drive source and the VTR is released.
An automatic cassette changing device for a VTR, characterized in that the push button is configured so that it can be returned freely. 3 A magazine section for storing tape cassettes and a VTR in conjunction with manually operated input means.
an operation unit having a mechanism for operating a push button;
An insertion/ejection section that inserts and ejects a cassette into the VTR's cassette holder, a push-down section that pushes down the cassette holder, and a pushbutton that automatically returns when the VTR stops operating in a predetermined tape running mode. Based on this detection signal, the operation section is controlled to operate the eject button of the VTR to automatically eject the cassette, and then insert a new cassette from the magazine section into the cassette holder of the VTR. . A control section for controlling the VTR to perform the predetermined tape running mode again by pressing down the holder and operating the automatically returned push button again. 4 A magazine section for storing tape cassettes and a VTR connected to manually operated input means.
an operation unit having a mechanism for operating a push button;
The input means includes an insertion/ejection section for inserting and ejecting a cassette into and out of a cassette holder of a VTR, and a push-down section for pushing down the cassette holder. The operating mechanism is configured such that the VTR push button can be returned freely after the VTR push button is operated, and includes the operating section, the insertion/ejection section,
The power of the push-down part and the VTR are turned off.
An automatic cassette exchange device for a VTR, comprising: a control unit that controls the VTR push button to be operated based on the self-maintained input when the power is turned on after the VTR push button is automatically restored. 5 A magazine section for storing tape cassettes and a VTR connected to a manually operated input means.
an operation unit having a mechanism for operating a push button;
The input means includes means for self-holding the input, and a push button for holding the input, and an insertion/ejection section for inserting and ejecting the cassette into and out of the cassette holder of the VTR, and a push-down section for pushing down the cassette holder. and self-holding release means that can release the self-holding in conjunction with the return when the self-holding device returns.
VCR cassette automatic exchange device. 6 A magazine section for storing tape cassettes and a VTR in conjunction with manually operated input means.
an operation unit having a mechanism for operating a push button;
An insertion/ejection section for inserting and ejecting a cassette into and out of the cassette holder of the VTR, a push-down section for pushing down the cassette holder, and an operation section for operating the operation section in response to inputting a stop mode using the input means, By operating the stop button of the tape running mode,
An automatic VTR cassette exchange device comprising a control unit that controls the VTR to stop and stand by.